Extended Bloom Phase

Extended Bloom Phase refers to cannabis cultivars that exhibit prolonged flowering periods, typically lasting 10–14 weeks or beyond, compared to standard 8–9 week phenotypes. This trait is commonly associated with certain landrace lineages and deliberate breeding selections favoring delayed maturation. Extended bloom cycles often correlate with increased resin development and complex cannabinoid/terpene maturation timelines. Breeders working in this category frequently report lineage contributions from equatorial or high-altitude origin strains. The trait presents trade-offs: longer cultivation periods require extended resources, but growers pursuing this phenotype often cite extended ripening as linked to final biomass development.

Breeders intentionally select for extended bloom phase when targeting specific cannabinoid or terpene profiles that require additional maturation time. This trait is particularly relevant in heritage breeding programs seeking to preserve slow-flowering landrace characteristics or in commercial breeding aimed at extended-shelf-life genetics.